<template>  
    <el-container class="home-container">
        <!-- 头部区域 -->
    <el-header>
        <div>
            <img src="../assets/logo.png" alt="">
            <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
        <!-- 页面主体区域 -->
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px':'200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
             <el-menu class="el-menu-vertical-demo" background-color="#333744" text-color="#fff" 
             active-text-color="#409Eff" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false"
             :router="true" :default-active="activePath">
               <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                    <!-- 一级菜单模板区域 -->
                    <template slot="title">
                     <!-- 图标 -->
                    <i :class="iconsObj[item.id]"></i>
                    <!-- 文本 -->
                    <span>{{item.authName}}</span>
                    </template>

                    <!-- 二级菜单 -->
                     <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children"
                      :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                    <!-- 图标 -->
                    <i class="el-icon-menu"></i>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
                     </el-menu-item>
                </el-submenu>
                </el-menu>
        </el-aside>
        <!-- 右侧主体区域 -->
        <el-main>
            <router-view></router-view>
        </el-main>
    </el-container>
    </el-container>
    
</template>

<script>
    export default {
        data(){
            return{
                menulist:[],
                iconsObj:{
                    '125':'el-icon-user-solid',
                    '103':'el-icon-s-operation',
                    '101':'el-icon-s-goods',
                    '102':'el-icon-s-order',
                    '145':'el-icon-s-data',
                },
                //侧边栏是否折叠
                isCollapse:false,
                //被激活的链接地址
                activePath:''

            }
        },
        created(){
            this.getMenuList(),
            this.activePath=window.sessionStorage.getItem('activePath')
        },
        methods:{
            logout(){
                window.sessionStorage.clear();
                this.$router.push('login')

            },
            //获取所有的菜单
            async getMenuList(){
                const {data:res}=await this.$http.get('menus')
                if(res.meta.status!==200) return this.$message.error(res.met.msg)
                this.menulist=res.data
            console.log(res);
            
           },
           //点击按钮切换菜单折叠、展开
           toggleCollapse(){
               this.isCollapse=!this.isCollapse
           },
           //保存链接激活状态
           saveNavState(activePath){
               window.sessionStorage.setItem('activePath',activePath)
                this.activePath=activePath
         }
        }
    }
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color:#373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: white;
    font-size: 22px;
        div{
            display: flex;
            align-items: center;
            span{
                margin-left:15px ;
            }
        }


        img{
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #eee;
   }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: white;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>